This paper discusses the Dynamic voltage restorer (DVR) operation and control for Voltage sags compensation. DVR is a series connected power electronic based device that can quickly mitigate the voltage sags in the system and restore the load voltage to the pre-fault value. Voltage sag associated with faults in transmission and distribution systems, energizing of transformers, and starting of l...

In this paper we present real-time application for detecting, extracting and automatic classification of transient disturbances in electric power network. Proposed method was implemented on Texas Instruments C6713 DSK toolkit and tested with both laboratory-generated and real-world power network signals with good results. For each detected transient a set of parameters is evaluated including th...

This paper bestows an optimal power control stratagem for an island microgrid. The foremost aim of this work is to improve the power quality of the microgrid. The primary performance parameters considered in this work are voltage regulation and frequency regulation, especially at the instant of shifting from grid tied mode to island mode of operation of the microgrid. An inner loop of current c...

A procedure for analysis of experimental data and model discrimination in regression of rate data of reversible, heterogeneous reactions which uses the power-law rate expression is described. The numerical values of the power-law parameters are calculated first by regression of the experimental data. These parameters are used to assess whether the quality of the experimental data is sufficient ...

Zhangjiakou regional network belongs to the Jibei power grid in Northern China and locates at the midway of the power transmission corridor from Inner-Mongolia to the rest of Jibei power grid. Zhangjiakou regional network consists of several area networks connected to the main network through 500kV stations. In recent years, renewable energy in rural areas has developed rapidly and electrified ...

Recently utilities and end users become more concerned about power quality issues because the load equipments are more sensitive to various power quality disturbances, such as harmonics and voltage fluctuation. Harmonic distortion and voltage flicker are the major causes in growing concern about electric power quality. Power quality disturbance monitoring plays an important role in the deregula...

This paper concerns the problem of proper evaluation of power quality in naval networks. Two aspects of the problem have been addressed. Firstly, the appropriate choice of power quality parameters for the aim has been discussed. Secondly, the methods of their estimation especially concerning aggregating of measurement intervals have been discussed. These considerations will be based on the basi...

background: in the current iranian poultry industry, antibiotics are the most frequently used additive in poultry feeds to increase productivity. the negative effects on human health, resulting from the consumption of chicken whose feeds contain antibiotics, makes finding an appropriate alternative of great importance. as a result of their nature, herbal extracts could be specifically considere...

a 4 days study was conducted to determine the effects of different concentration of bioaugmentor bacterial strain bacillus licheniformisi, b. subtilis, b. polymyxa, b. laterosporus and b. circulans (protexin aquatech, uk) on adjustment of parameters of water quality as tan, no2-n, no3-n and turbidity from the effluent of common carp ponds. effects of time and concentration were studied as a com...